Default data adaptor error when deploying a war file in weblogic

Question

Hi All,
Newbie here with a few questions regarding the deployment of OPA 10.1. Really hoping you guys can help...
1) I'm attempting to deploy an unexploded web-determinations.war file on WebLogic. Thanks to this forum I've got past the issues of "rulebase directory not found" etc. However, i'm now faced with an issue which I can't find any info on. Please see below.
3672074 [[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'] WARN com.or
acle.determinations.web.platform.controller.actions.StartSessionAction - Could not instansate defau
lt data adaptor
java.lang.NullPointerException
at java.io.File.<init>(File.java:194)
at com.oracle.determinations.web.platform.plugins.data.XDSDataAdaptor.<init>(XDSDataAdaptor.
java:55)
at com.oracle.determinations.web.platform.controller.actions.StartSessionAction.createInterv
iewSession(StartSessionAction.java:173)
at com.oracle.determinations.web.platform.controller.actions.StartSessionAction.getResource(
StartSessionAction.java:66)
at com.oracle.determinations.web.platform.servlet.WebDeterminationsServlet.doGet(WebDetermin
ationsServlet.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.
java:226)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:124)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at com.oracle.determinations.web.platform.util.CharsetFilter.doFilter(CharsetFilter.java:46)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletC
ontext.java:3393)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2
140)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2046)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1366)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:200)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:172)
I've got the following entry in the application.properties file too...
# Default XDS data adaptor file path
#xds.file.path =data
From what we can see we believe the code is getting a null pointer because of the following method in the WebDeterminationsServletContext class.
public String resolveFullPath(String path)
File f = new File(path);
return f.isAbsolute() ? f.getAbsolutePath() : this.servletContext.getRealPath(path);
We believe the getRealPath(path), highlighted in red, is returning null. Any ideas how we can resolve this?
2) The second issue I'm facing is with regards the plugins.libraries property in the application.properties file. I've got the entry as
plugin.libraries =DataAdaptor.DA;
which should point to our customised data adaptor. However I'm getting the following error.
4242994 [[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'] WARN com.or
acle.determinations.web.platform.servlet.WebDeterminationsServletContext - Can not find class: Data
Adaptor.DA
4243025 [[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'] WARN com.or
acle.determinations.interview.engine.local.LocalInterviewEngine - Can not find class: DataAdaptor.D
A
3) Also, does anyone know if it's possible to deploy a web-determinations.war file containing additional internal application code? What we're attempting to do is deliver a single war file which not only holds the web determination code but also all the code for an application which wraps the OWD within it. At present this just isn't working. I'm not sure what the conflict is exactly. The only way i seem to be able to get this working is by deploying the code in two seperate war files.
Any help on these issues would be greaty appreciated.
Thanks,
Taj

Answer 1

(2) is being caused because your data adaptor plugin is not installed properly. The jar that contains your plugin needs to go in the WEB-INF/lib directory and you must specify the fully qualified class name in the plugin.libraries property of the application.properties file.
If you haven't provided a custom data adaptor, Web Determinations will configure and attach the default one for use instead, which is file based. If you are deploying to WebLogic as an unxeploded war, you must configure the directory the default data directory the plugin will uses by specifying an absolute path that your instance of Web Determinations has read/write permissions to in the xds.file.path property of the application.properties file. In your case (1) is basically being caused by (2) since if the your data adaptor was loaded correctly the default one wouldn't load at all.
As for (3) yes it's likely possible, provided you don't have library conflicts. How it's done really depends on what these additional customisations consist of.